Using pythagorean theorem :
[tex]c^2=a^2+b^2[/tex]
where a and b are the legs of the triangle
and
c is the hypotenuse
[tex]\begin{gathered} 19^2=17^2+x^2 \\ x^2=19^2-17^2^{} \\ x^2=361-289 \\ x^2=72 \\ x=\sqrt[]{72} \\ x=8.485 \end{gathered}[/tex]
The answer is 8.49
